Trying Out Marriage With My Female Friend by Usui Shio — Ongoing

Also known as Onna Tomodachi to Kekkon Shitemita

Onnatomo

Two women who are just friends make a pact... "If both of us are still single in 5 years, let's get married." Five years later, they meet again, and their married life begins.

Serialized in Yuri Hime starting in January 2021.

Chapter 1 released Nov 23 '20 Bread
Chapter 2 released Dec 29 '20